Search for the rare decay J/ψ\to γD^0+c.c. at BESIII

Using (10087\pm44)\times10^6J/\psi events collected with the BESIII detector, we search for the rare decay J/\psi \to \gamma D^0+c.c. for the first time. No obvious signal is observed and the upper limit on the branching fraction is determined to be {\cal B}(J/\psi \to \gamma D^{0}+c.c.)< 9.1 \times 10^{-8} at 90\% confidence... Show more